摘要
目的 明确17 号染色体微卫星不稳定性(MI) 和杂合性丢失(LOH) 与非小细胞肺癌(NSCLC) 的关系。方法 对35 例NSCLC肿瘤切除组织和肿瘤旁正常组织,采用聚合酶链反应微卫星长度多态性分析方法检测了17 号染色体上4 个微卫星位点TP53(17p13-1)、THRA1(17q11-212)、D17S579(17q1221)、D17S855(17q21) 的MI和LOH。结果 35 例NSCLC中,17 号染色体MI和(或)LOH的发生率为63% (24/35),其中MI为40% (14/35) ,LOH 为31% (11/35)。同时表现有MI和LOH 为9% (3/35) 。早期NSCLC( Ⅰ期和Ⅱ期) 17 号染色体MI和( 或)LOH 发生率为79% (15/19),明显大于晚期( Ⅲ期)NSCLC(44% ,7/16,P<0-05) 。无纵隔淋巴结转移的NSCLC的MI和( 或)LOH 发生率(87% ) 亦明显大于已有纵隔淋巴结转移者(48% ),P< 0-05。MI和( 或)LOH 在不同肿瘤组织类型以及不同组织细胞分化程度之间差异无显著性,P>0.05。结论 17 号染色体MI和LOH
Objective Toidentifythe presenceof microsatelliteinstability(MI) andlossofheterozygosity (LOH)in non smallcelllungcarcinoma(NSCLC)- Methods Four microsatellite markersTP53(17p13-1) ,THRA1 (17q11-2 12) ,D17S579(17q12 21) and D17S855(17q21) were used to examine 35 cases of NSCLCtumor normal pairedtissuesfor MIand LOHat chromosome 17 using PCRbased analysis- Results 22 of35 tumors(63% ) displayed MIorLOH- 14 tumors(40% )exhibited MI,11 tumors(31% ) exhibited LOH,while 3 tumors (9% ) exhibited MIand LOHconcurrently- Thefrequencyof MIor LOHwasobviously higherintheearly stage(stagesⅠ andⅡ,79%) thanintheadvanced stage(stage Ⅲ,44 %) ,P<0.05- However,thefrequencyof MIorLOHhad no significant difference between high grade differentiated NSCLCtumors and low grade ones, P> 0-05- No relationship wasobserved between the presence of MIor LOHand the histologic subtype of NSCLC, P> 0-05- Conclusions The results suggest that MIand LOH at chromosome 17 may play a significant role in the developmentof NSCLC- The high frequency of MIor LOHin the early stagetumorsindicatesthatthese genetic alterations could occurearly during NSCLCdevelopment-
出处
《中华结核和呼吸杂志》
CAS
CSCD
北大核心
1999年第12期743-743,共1页
Chinese Journal of Tuberculosis and Respiratory Diseases
基金
卫生部科研基金!资助( 基金编号:941316)
关键词
微卫星不稳定性
杂合性丢失
非小细胞肺癌
肺癌
Microsatelliteinstability Loss ofheterozygosity Carcinoma,non smallcelllung